Interesting idea, nice visuals. I don't understand the purpose of static noise in the background, it's an artistic choice i guess. I find the concept of damaging the player only with counter-attacks a bit constrictive. But the real problem for me is, i don't feel that i hit the opponent, there's no feedback. There's no counter-attacking animation after parrying the attack. One more thing is that its extremely difficult. It was almost impossible for me to parry the attacks three times in a row. There definitely needs to be some sort of telegraphing system to warn the player.
I also made a similar sword fighting game btw and it's pretty broken in it's current state. I have a parrying and blocking system in that game too. Creating an engaging fun combat system is a very challenging task. So i can understand the difficulties you faced during the development of your game.
In any case this is a valuable project for you to gain further experience in game development and for others to analyze, study compare with their own game. I appreciate the hardwork and creativity behind this game. Good luck on your future projects